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diff --git a/src/script/api/script_execmode.hpp b/src/script/api/script_execmode.hpp
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+++ b/src/script/api/script_execmode.hpp
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+/* $Id$ */
+
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+ * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file script_execmode.hpp Switch the AI to Execute Mode. */
+
+#ifndef SCRIPT_EXECMODE_HPP
+#define SCRIPT_EXECMODE_HPP
+
+#include "script_object.hpp"
+
+/**
+ * Class to switch current mode to Execute Mode.
+ * If you create an instance of this class, the mode will be switched to
+ *   Execute. The original mode is stored and recovered from when ever the
+ *   instance is destroyed.
+ * In Execute mode all commands you do are executed for real.
+ */
+class AIExecMode : public AIObject {
+private:
+	AIModeProc *last_mode;   ///< The previous mode we were in.
+	AIObject *last_instance; ///< The previous instace of the mode.
+
+protected:
+	/**
+	 * The callback proc for Execute mode.
+	 */
+	static bool ModeProc();
+
+public:
+	/**
+	 * Creating instance of this class switches the build mode to Execute.
+	 * @note When the instance is destroyed, he restores the mode that was
+	 *   current when the instance was created!
+	 */
+	AIExecMode();
+
+	/**
+	 * Destroying this instance reset the building mode to the mode it was
+	 *   in when the instance was created.
+	 */
+	~AIExecMode();
+};
+
+#endif /* SCRIPT_EXECMODE_HPP */